We moved back outside to rest. The night was uneventful. The following morning we moved back inside. 2 of the Grave Knights were still there, laying as we left them. Stirling was able to disintegrate them. However, the lightning Grave Knight had disappeared. We followed further into the complex. Soon we found the Grave Knight hiding ahead of us. After a quick fight we downed it, but not before a Stone Golem joined the fight. We defeated the Golem as well. Afterward, Stirling disintegrated this Grave Knight too. Heading on we came to a door with with 4 large pins holding it closed. Sir Arathur surmised there must be some mechanisms nearby that would pull the pins back. Looking in nearby rooms we found an Elemental Avalanche & an Elemental Inferno on one side and a bit later we found an Elemental Tsunami & an Elemental Hurricane. Luckily we were able to fight these over the course of 2 separate fights. While dangerous we were able to handle them well. Once we cleared the area we did indeed find 4 mechanisms that released the pins!